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7.2 Air Pressure Switch Replacement
Step 1 Disconnect the two silicone impulse
tubes and three wiring connections making note
of replacement positions.
Step 2 Remove the two screws as shown
below.
Step 3 The air pressure switch can now be
removed.
Step 4
Fit the new air pressure switch ensuring the
impulse tubes are connected as shown below.
Step 5
Test product
a n d
c l o s e
access doors.
7.3 Gas Valve Replacement
Step 1 Remove the burner assembly as
described in the section 4.3 Servicing.
Step 3 Open the left hand access door and
detach the impulse hoses from the air pressure
switch.
Step 4 Remove the 4 screws holding the burner
head onto the burner assembly.
Step 5 The burner head can now be detached
by disconnecting the impulse tube and the
burner head wiring.
Step 6 Detach the two screws holding the front
of the gas valve.
Summary of Contents for VISION VSO
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